Haha! That depends on the situation. Girls will do this subconsciously if they are shy. They will also do this if they smell a pungent smell. There are many of them in costume TV series. They all have their little fingers raised, which is a gesture that portrays the feminine beauty of a woman. Modern women are open-minded and rarely do this kind of thing. Most of them are done inadvertently when meditating. Another meaning is that in ancient times, it was better for women to smile without showing their teeth, which is also one of the standards for ladies. When they are ridiculous, they will inevitably show their teeth, so they will wear a handkerchief with them and sandwich it to cover up the indecency. of teeth.